Data Source: Current Industrial Reports and Manufacturing Industry Series Reports, U.S. Department of Commerce, Bureau of the Census.

NEMA is the largest trade association in the United States representing companies that manufacture products for the electroindustry. Its member companies fall into one or more of nine NEMA divisions, each made up of sections whose companies manufacture the same or related products. Together, they manufacture a broad range of products for the generation, transmission, distribution, control, and end-use of electricity.